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1/*
2 * linux/include/linux/ufs_fs.h
3 *
4 * Copyright (C) 1996
5 * Adrian Rodriguez (adrian@franklins-tower.rutgers.edu)
6 * Laboratory for Computer Science Research Computing Facility
7 * Rutgers, The State University of New Jersey
8 *
9 * Clean swab support by Fare <fare@tunes.org>
10 * just hope no one is using NNUUXXI on __?64 structure elements
11 * 64-bit clean thanks to Maciej W. Rozycki <macro@ds2.pg.gda.pl>
12 *
13 * 4.4BSD (FreeBSD) support added on February 1st 1998 by
14 * Niels Kristian Bech Jensen <nkbj@image.dk> partially based
15 * on code by Martin von Loewis <martin@mira.isdn.cs.tu-berlin.de>.
16 *
17 * NeXTstep support added on February 5th 1998 by
18 * Niels Kristian Bech Jensen <nkbj@image.dk>.
19 *
20 * Write support by Daniel Pirkl <daniel.pirkl@email.cz>
21 *
22 * HP/UX hfs filesystem support added by
23 * Martin K. Petersen <mkp@mkp.net>, August 1999
24 *
25 * UFS2 (of FreeBSD 5.x) support added by
26 * Niraj Kumar <niraj17@iitbombay.org> , Jan 2004
27 *
28 */
29
30#ifndef __LINUX_UFS_FS_H
31#define __LINUX_UFS_FS_H
32
33#include <linux/types.h>
34#include <linux/kernel.h>
35#include <linux/stat.h>
36#include <linux/fs.h>
37
38#include <asm/div64.h>
39typedef __u64 __bitwise __fs64;
40typedef __u32 __bitwise __fs32;
41typedef __u16 __bitwise __fs16;
42
43#define UFS_BBLOCK 0
44#define UFS_BBSIZE 8192
45#define UFS_SBLOCK 8192
46#define UFS_SBSIZE 8192
47
48#define UFS_SECTOR_SIZE 512
49#define UFS_SECTOR_BITS 9
50#define UFS_MAGIC 0x00011954
51#define UFS2_MAGIC 0x19540119
52#define UFS_CIGAM 0x54190100 /* byteswapped MAGIC */
53
54/* Copied from FreeBSD */
55/*
56 * Each disk drive contains some number of filesystems.
57 * A filesystem consists of a number of cylinder groups.
58 * Each cylinder group has inodes and data.
59 *
60 * A filesystem is described by its super-block, which in turn
61 * describes the cylinder groups. The super-block is critical
62 * data and is replicated in each cylinder group to protect against
63 * catastrophic loss. This is done at `newfs' time and the critical
64 * super-block data does not change, so the copies need not be
65 * referenced further unless disaster strikes.
66 *
67 * For filesystem fs, the offsets of the various blocks of interest
68 * are given in the super block as:
69 * [fs->fs_sblkno] Super-block
70 * [fs->fs_cblkno] Cylinder group block
71 * [fs->fs_iblkno] Inode blocks
72 * [fs->fs_dblkno] Data blocks
73 * The beginning of cylinder group cg in fs, is given by
74 * the ``cgbase(fs, cg)'' macro.
75 *
76 * Depending on the architecture and the media, the superblock may
77 * reside in any one of four places. For tiny media where every block
78 * counts, it is placed at the very front of the partition. Historically,
79 * UFS1 placed it 8K from the front to leave room for the disk label and
80 * a small bootstrap. For UFS2 it got moved to 64K from the front to leave
81 * room for the disk label and a bigger bootstrap, and for really piggy
82 * systems we check at 256K from the front if the first three fail. In
83 * all cases the size of the superblock will be SBLOCKSIZE. All values are
84 * given in byte-offset form, so they do not imply a sector size. The
85 * SBLOCKSEARCH specifies the order in which the locations should be searched.
86 */
87#define SBLOCK_FLOPPY 0
88#define SBLOCK_UFS1 8192
89#define SBLOCK_UFS2 65536
90#define SBLOCK_PIGGY 262144
91#define SBLOCKSIZE 8192
92#define SBLOCKSEARCH \
93 { SBLOCK_UFS2, SBLOCK_UFS1, SBLOCK_FLOPPY, SBLOCK_PIGGY, -1 }
94
95
96/* HP specific MAGIC values */
97
98#define UFS_MAGIC_LFN 0x00095014 /* fs supports filenames > 14 chars */
99#define UFS_CIGAM_LFN 0x14500900 /* srahc 41 < semanelif stroppus sf */
100
101#define UFS_MAGIC_SEC 0x00612195 /* B1 security fs */
102#define UFS_CIGAM_SEC 0x95216100
103
104#define UFS_MAGIC_FEA 0x00195612 /* fs_featurebits supported */
105#define UFS_CIGAM_FEA 0x12561900
106
107#define UFS_MAGIC_4GB 0x05231994 /* fs > 4 GB && fs_featurebits */
108#define UFS_CIGAM_4GB 0x94192305
109
110/* Seems somebody at HP goofed here. B1 and lfs are both 0x2 !?! */
111#define UFS_FSF_LFN 0x00000001 /* long file names */
112#define UFS_FSF_B1 0x00000002 /* B1 security */
113#define UFS_FSF_LFS 0x00000002 /* large files */
114#define UFS_FSF_LUID 0x00000004 /* large UIDs */
115
116/* End of HP stuff */
117
118
119#define UFS_BSIZE 8192
120#define UFS_MINBSIZE 4096
121#define UFS_FSIZE 1024
122#define UFS_MAXFRAG (UFS_BSIZE / UFS_FSIZE)
123
124#define UFS_NDADDR 12
125#define UFS_NINDIR 3
126
127#define UFS_IND_BLOCK (UFS_NDADDR + 0)
128#define UFS_DIND_BLOCK (UFS_NDADDR + 1)
129#define UFS_TIND_BLOCK (UFS_NDADDR + 2)
130
131#define UFS_NDIR_FRAGMENT (UFS_NDADDR << uspi->s_fpbshift)
132#define UFS_IND_FRAGMENT (UFS_IND_BLOCK << uspi->s_fpbshift)
133#define UFS_DIND_FRAGMENT (UFS_DIND_BLOCK << uspi->s_fpbshift)
134#define UFS_TIND_FRAGMENT (UFS_TIND_BLOCK << uspi->s_fpbshift)
135
136#define UFS_ROOTINO 2
137#define UFS_FIRST_INO (UFS_ROOTINO + 1)
138
139#define UFS_USEEFT ((__u16)65535)
140
141#define UFS_FSOK 0x7c269d38
142#define UFS_FSACTIVE ((__s8)0x00)
143#define UFS_FSCLEAN ((__s8)0x01)
144#define UFS_FSSTABLE ((__s8)0x02)
145#define UFS_FSOSF1 ((__s8)0x03) /* is this correct for DEC OSF/1? */
146#define UFS_FSBAD ((__s8)0xff)
147
148/* From here to next blank line, s_flags for ufs_sb_info */
149/* directory entry encoding */
150#define UFS_DE_MASK 0x00000010 /* mask for the following */
151#define UFS_DE_OLD 0x00000000
152#define UFS_DE_44BSD 0x00000010
153/* uid encoding */
154#define UFS_UID_MASK 0x00000060 /* mask for the following */
155#define UFS_UID_OLD 0x00000000
156#define UFS_UID_44BSD 0x00000020
157#define UFS_UID_EFT 0x00000040
158/* superblock state encoding */
159#define UFS_ST_MASK 0x00000700 /* mask for the following */
160#define UFS_ST_OLD 0x00000000
161#define UFS_ST_44BSD 0x00000100
162#define UFS_ST_SUN 0x00000200 /* Solaris */
163#define UFS_ST_SUNOS 0x00000300
164#define UFS_ST_SUNx86 0x00000400 /* Solaris x86 */
165/*cylinder group encoding */
166#define UFS_CG_MASK 0x00003000 /* mask for the following */
167#define UFS_CG_OLD 0x00000000
168#define UFS_CG_44BSD 0x00002000
169#define UFS_CG_SUN 0x00001000
170/* filesystem type encoding */
171#define UFS_TYPE_MASK 0x00010000 /* mask for the following */
172#define UFS_TYPE_UFS1 0x00000000
173#define UFS_TYPE_UFS2 0x00010000
174
175
176/* fs_inodefmt options */
177#define UFS_42INODEFMT -1
178#define UFS_44INODEFMT 2
179
180/*
181 * MINFREE gives the minimum acceptable percentage of file system
182 * blocks which may be free. If the freelist drops below this level
183 * only the superuser may continue to allocate blocks. This may
184 * be set to 0 if no reserve of free blocks is deemed necessary,
185 * however throughput drops by fifty percent if the file system
186 * is run at between 95% and 100% full; thus the minimum default
187 * value of fs_minfree is 5%. However, to get good clustering
188 * performance, 10% is a better choice. hence we use 10% as our
189 * default value. With 10% free space, fragmentation is not a
190 * problem, so we choose to optimize for time.
191 */
192#define UFS_MINFREE 5
193#define UFS_DEFAULTOPT UFS_OPTTIME
194
195/*
196 * Turn file system block numbers into disk block addresses.
197 * This maps file system blocks to device size blocks.
198 */
199#define ufs_fsbtodb(uspi, b) ((b) << (uspi)->s_fsbtodb)
200#define ufs_dbtofsb(uspi, b) ((b) >> (uspi)->s_fsbtodb)
201
202/*
203 * Cylinder group macros to locate things in cylinder groups.
204 * They calc file system addresses of cylinder group data structures.
205 */
206#define ufs_cgbase(c) (uspi->s_fpg * (c))
207#define ufs_cgstart(c) ((uspi)->fs_magic == UFS2_MAGIC ? ufs_cgbase(c) : \
208 (ufs_cgbase(c) + uspi->s_cgoffset * ((c) & ~uspi->s_cgmask)))
209#define ufs_cgsblock(c) (ufs_cgstart(c) + uspi->s_sblkno) /* super blk */
210#define ufs_cgcmin(c) (ufs_cgstart(c) + uspi->s_cblkno) /* cg block */
211#define ufs_cgimin(c) (ufs_cgstart(c) + uspi->s_iblkno) /* inode blk */
212#define ufs_cgdmin(c) (ufs_cgstart(c) + uspi->s_dblkno) /* 1st data */
213
214/*
215 * Macros for handling inode numbers:
216 * inode number to file system block offset.
217 * inode number to cylinder group number.
218 * inode number to file system block address.
219 */
220#define ufs_inotocg(x) ((x) / uspi->s_ipg)
221#define ufs_inotocgoff(x) ((x) % uspi->s_ipg)
222#define ufs_inotofsba(x) (((u64)ufs_cgimin(ufs_inotocg(x))) + ufs_inotocgoff(x) / uspi->s_inopf)
223#define ufs_inotofsbo(x) ((x) % uspi->s_inopf)
224
225/*
226 * Compute the cylinder and rotational position of a cyl block addr.
227 */
228#define ufs_cbtocylno(bno) \
229 ((bno) * uspi->s_nspf / uspi->s_spc)
230#define ufs_cbtorpos(bno) \
231 ((((bno) * uspi->s_nspf % uspi->s_spc / uspi->s_nsect \
232 * uspi->s_trackskew + (bno) * uspi->s_nspf % uspi->s_spc \
233 % uspi->s_nsect * uspi->s_interleave) % uspi->s_nsect \
234 * uspi->s_nrpos) / uspi->s_npsect)
235
236/*
237 * The following macros optimize certain frequently calculated
238 * quantities by using shifts and masks in place of divisions
239 * modulos and multiplications.
240 */
241#define ufs_blkoff(loc) ((loc) & uspi->s_qbmask)
242#define ufs_fragoff(loc) ((loc) & uspi->s_qfmask)
243#define ufs_lblktosize(blk) ((blk) << uspi->s_bshift)
244#define ufs_lblkno(loc) ((loc) >> uspi->s_bshift)
245#define ufs_numfrags(loc) ((loc) >> uspi->s_fshift)
246#define ufs_blkroundup(size) (((size) + uspi->s_qbmask) & uspi->s_bmask)
247#define ufs_fragroundup(size) (((size) + uspi->s_qfmask) & uspi->s_fmask)
248#define ufs_fragstoblks(frags) ((frags) >> uspi->s_fpbshift)
249#define ufs_blkstofrags(blks) ((blks) << uspi->s_fpbshift)
250#define ufs_fragnum(fsb) ((fsb) & uspi->s_fpbmask)
251#define ufs_blknum(fsb) ((fsb) & ~uspi->s_fpbmask)
252
253#define UFS_MAXNAMLEN 255
254#define UFS_MAXMNTLEN 512
255#define UFS2_MAXMNTLEN 468
256#define UFS2_MAXVOLLEN 32
257#define UFS_MAXCSBUFS 31
258#define UFS_LINK_MAX 32000
259/*
260#define UFS2_NOCSPTRS ((128 / sizeof(void *)) - 4)
261*/
262#define UFS2_NOCSPTRS 28
263
264/*
265 * UFS_DIR_PAD defines the directory entries boundaries
266 * (must be a multiple of 4)
267 */
268#define UFS_DIR_PAD 4
269#define UFS_DIR_ROUND (UFS_DIR_PAD - 1)
270#define UFS_DIR_REC_LEN(name_len) (((name_len) + 1 + 8 + UFS_DIR_ROUND) & ~UFS_DIR_ROUND)
271
272struct ufs_timeval {
273 __fs32 tv_sec;
274 __fs32 tv_usec;
275};
276
277struct ufs_dir_entry {
278 __fs32 d_ino; /* inode number of this entry */
279 __fs16 d_reclen; /* length of this entry */
280 union {
281 __fs16 d_namlen; /* actual length of d_name */
282 struct {
283 __u8 d_type; /* file type */
284 __u8 d_namlen; /* length of string in d_name */
285 } d_44;
286 } d_u;
287 __u8 d_name[UFS_MAXNAMLEN + 1]; /* file name */
288};
289
290struct ufs_csum {
291 __fs32 cs_ndir; /* number of directories */
292 __fs32 cs_nbfree; /* number of free blocks */
293 __fs32 cs_nifree; /* number of free inodes */
294 __fs32 cs_nffree; /* number of free frags */
295};
296struct ufs2_csum_total {
297 __fs64 cs_ndir; /* number of directories */
298 __fs64 cs_nbfree; /* number of free blocks */
299 __fs64 cs_nifree; /* number of free inodes */
300 __fs64 cs_nffree; /* number of free frags */
301 __fs64 cs_numclusters; /* number of free clusters */
302 __fs64 cs_spare[3]; /* future expansion */
303};
304
305struct ufs_csum_core {
306 __u64 cs_ndir; /* number of directories */
307 __u64 cs_nbfree; /* number of free blocks */
308 __u64 cs_nifree; /* number of free inodes */
309 __u64 cs_nffree; /* number of free frags */
310 __u64 cs_numclusters; /* number of free clusters */
311};
312
313/*
314 * File system flags
315 */
316#define UFS_UNCLEAN 0x01 /* file system not clean at mount (unused) */
317#define UFS_DOSOFTDEP 0x02 /* file system using soft dependencies */
318#define UFS_NEEDSFSCK 0x04 /* needs sync fsck (FreeBSD compat, unused) */
319#define UFS_INDEXDIRS 0x08 /* kernel supports indexed directories */
320#define UFS_ACLS 0x10 /* file system has ACLs enabled */
321#define UFS_MULTILABEL 0x20 /* file system is MAC multi-label */
322#define UFS_FLAGS_UPDATED 0x80 /* flags have been moved to new location */
323
324#if 0
325/*
326 * This is the actual superblock, as it is laid out on the disk.
327 * Do NOT use this structure, because of sizeof(ufs_super_block) > 512 and
328 * it may occupy several blocks, use
329 * struct ufs_super_block_(first,second,third) instead.
330 */
331struct ufs_super_block {
332 union {
333 struct {
334 __fs32 fs_link; /* UNUSED */
335 } fs_42;
336 struct {
337 __fs32 fs_state; /* file system state flag */
338 } fs_sun;
339 } fs_u0;
340 __fs32 fs_rlink; /* UNUSED */
341 __fs32 fs_sblkno; /* addr of super-block in filesys */
342 __fs32 fs_cblkno; /* offset of cyl-block in filesys */
343 __fs32 fs_iblkno; /* offset of inode-blocks in filesys */
344 __fs32 fs_dblkno; /* offset of first data after cg */
345 __fs32 fs_cgoffset; /* cylinder group offset in cylinder */
346 __fs32 fs_cgmask; /* used to calc mod fs_ntrak */
347 __fs32 fs_time; /* last time written -- time_t */
348 __fs32 fs_size; /* number of blocks in fs */
349 __fs32 fs_dsize; /* number of data blocks in fs */
350 __fs32 fs_ncg; /* number of cylinder groups */
351 __fs32 fs_bsize; /* size of basic blocks in fs */
352 __fs32 fs_fsize; /* size of frag blocks in fs */
353 __fs32 fs_frag; /* number of frags in a block in fs */
354/* these are configuration parameters */
355 __fs32 fs_minfree; /* minimum percentage of free blocks */
356 __fs32 fs_rotdelay; /* num of ms for optimal next block */
357 __fs32 fs_rps; /* disk revolutions per second */
358/* these fields can be computed from the others */
359 __fs32 fs_bmask; /* ``blkoff'' calc of blk offsets */
360 __fs32 fs_fmask; /* ``fragoff'' calc of frag offsets */
361 __fs32 fs_bshift; /* ``lblkno'' calc of logical blkno */
362 __fs32 fs_fshift; /* ``numfrags'' calc number of frags */
363/* these are configuration parameters */
364 __fs32 fs_maxcontig; /* max number of contiguous blks */
365 __fs32 fs_maxbpg; /* max number of blks per cyl group */
366/* these fields can be computed from the others */
367 __fs32 fs_fragshift; /* block to frag shift */
368 __fs32 fs_fsbtodb; /* fsbtodb and dbtofsb shift constant */
369 __fs32 fs_sbsize; /* actual size of super block */
370 __fs32 fs_csmask; /* csum block offset */
371 __fs32 fs_csshift; /* csum block number */
372 __fs32 fs_nindir; /* value of NINDIR */
373 __fs32 fs_inopb; /* value of INOPB */
374 __fs32 fs_nspf; /* value of NSPF */
375/* yet another configuration parameter */
376 __fs32 fs_optim; /* optimization preference, see below */
377/* these fields are derived from the hardware */
378 union {
379 struct {
380 __fs32 fs_npsect; /* # sectors/track including spares */
381 } fs_sun;
382 struct {
383 __fs32 fs_state; /* file system state time stamp */
384 } fs_sunx86;
385 } fs_u1;
386 __fs32 fs_interleave; /* hardware sector interleave */
387 __fs32 fs_trackskew; /* sector 0 skew, per track */
388/* a unique id for this filesystem (currently unused and unmaintained) */
389/* In 4.3 Tahoe this space is used by fs_headswitch and fs_trkseek */
390/* Neither of those fields is used in the Tahoe code right now but */
391/* there could be problems if they are. */
392 __fs32 fs_id[2]; /* file system id */
393/* sizes determined by number of cylinder groups and their sizes */
394 __fs32 fs_csaddr; /* blk addr of cyl grp summary area */
395 __fs32 fs_cssize; /* size of cyl grp summary area */
396 __fs32 fs_cgsize; /* cylinder group size */
397/* these fields are derived from the hardware */
398 __fs32 fs_ntrak; /* tracks per cylinder */
399 __fs32 fs_nsect; /* sectors per track */
400 __fs32 fs_spc; /* sectors per cylinder */
401/* this comes from the disk driver partitioning */
402 __fs32 fs_ncyl; /* cylinders in file system */
403/* these fields can be computed from the others */
404 __fs32 fs_cpg; /* cylinders per group */
405 __fs32 fs_ipg; /* inodes per cylinder group */
406 __fs32 fs_fpg; /* blocks per group * fs_frag */
407/* this data must be re-computed after crashes */
408 struct ufs_csum fs_cstotal; /* cylinder summary information */
409/* these fields are cleared at mount time */
410 __s8 fs_fmod; /* super block modified flag */
411 __s8 fs_clean; /* file system is clean flag */
412 __s8 fs_ronly; /* mounted read-only flag */
413 __s8 fs_flags;
414 union {
415 struct {
416 __s8 fs_fsmnt[UFS_MAXMNTLEN];/* name mounted on */
417 __fs32 fs_cgrotor; /* last cg searched */
418 __fs32 fs_csp[UFS_MAXCSBUFS];/*list of fs_cs info buffers */
419 __fs32 fs_maxcluster;
420 __fs32 fs_cpc; /* cyl per cycle in postbl */
421 __fs16 fs_opostbl[16][8]; /* old rotation block list head */
422 } fs_u1;
423 struct {
424 __s8 fs_fsmnt[UFS2_MAXMNTLEN]; /* name mounted on */
425 __u8 fs_volname[UFS2_MAXVOLLEN]; /* volume name */
426 __fs64 fs_swuid; /* system-wide uid */
427 __fs32 fs_pad; /* due to alignment of fs_swuid */
428 __fs32 fs_cgrotor; /* last cg searched */
429 __fs32 fs_ocsp[UFS2_NOCSPTRS]; /*list of fs_cs info buffers */
430 __fs32 fs_contigdirs;/*# of contiguously allocated dirs */
431 __fs32 fs_csp; /* cg summary info buffer for fs_cs */
432 __fs32 fs_maxcluster;
433 __fs32 fs_active;/* used by snapshots to track fs */
434 __fs32 fs_old_cpc; /* cyl per cycle in postbl */
435 __fs32 fs_maxbsize;/*maximum blocking factor permitted */
436 __fs64 fs_sparecon64[17];/*old rotation block list head */
437 __fs64 fs_sblockloc; /* byte offset of standard superblock */
438 struct ufs2_csum_total fs_cstotal;/*cylinder summary information*/
439 struct ufs_timeval fs_time; /* last time written */
440 __fs64 fs_size; /* number of blocks in fs */
441 __fs64 fs_dsize; /* number of data blocks in fs */
442 __fs64 fs_csaddr; /* blk addr of cyl grp summary area */
443 __fs64 fs_pendingblocks;/* blocks in process of being freed */
444 __fs32 fs_pendinginodes;/*inodes in process of being freed */
445 } fs_u2;
446 } fs_u11;
447 union {
448 struct {
449 __fs32 fs_sparecon[53];/* reserved for future constants */
450 __fs32 fs_reclaim;
451 __fs32 fs_sparecon2[1];
452 __fs32 fs_state; /* file system state time stamp */
453 __fs32 fs_qbmask[2]; /* ~usb_bmask */
454 __fs32 fs_qfmask[2]; /* ~usb_fmask */
455 } fs_sun;
456 struct {
457 __fs32 fs_sparecon[53];/* reserved for future constants */
458 __fs32 fs_reclaim;
459 __fs32 fs_sparecon2[1];
460 __fs32 fs_npsect; /* # sectors/track including spares */
461 __fs32 fs_qbmask[2]; /* ~usb_bmask */
462 __fs32 fs_qfmask[2]; /* ~usb_fmask */
463 } fs_sunx86;
464 struct {
465 __fs32 fs_sparecon[50];/* reserved for future constants */
466 __fs32 fs_contigsumsize;/* size of cluster summary array */
467 __fs32 fs_maxsymlinklen;/* max length of an internal symlink */
468 __fs32 fs_inodefmt; /* format of on-disk inodes */
469 __fs32 fs_maxfilesize[2]; /* max representable file size */
470 __fs32 fs_qbmask[2]; /* ~usb_bmask */
471 __fs32 fs_qfmask[2]; /* ~usb_fmask */
472 __fs32 fs_state; /* file system state time stamp */
473 } fs_44;
474 } fs_u2;
475 __fs32 fs_postblformat; /* format of positional layout tables */
476 __fs32 fs_nrpos; /* number of rotational positions */
477 __fs32 fs_postbloff; /* (__s16) rotation block list head */
478 __fs32 fs_rotbloff; /* (__u8) blocks for each rotation */
479 __fs32 fs_magic; /* magic number */
480 __u8 fs_space[1]; /* list of blocks for each rotation */
481};
482#endif/*struct ufs_super_block*/
483
484/*
485 * Preference for optimization.
486 */
487#define UFS_OPTTIME 0 /* minimize allocation time */
488#define UFS_OPTSPACE 1 /* minimize disk fragmentation */
489
490/*
491 * Rotational layout table format types
492 */
493#define UFS_42POSTBLFMT -1 /* 4.2BSD rotational table format */
494#define UFS_DYNAMICPOSTBLFMT 1 /* dynamic rotational table format */
495
496/*
497 * Convert cylinder group to base address of its global summary info.
498 */
499#define fs_cs(indx) s_csp[(indx)]
500
501/*
502 * Cylinder group block for a file system.
503 *
504 * Writable fields in the cylinder group are protected by the associated
505 * super block lock fs->fs_lock.
506 */
507#define CG_MAGIC 0x090255
508#define ufs_cg_chkmagic(sb, ucg) \
509 (fs32_to_cpu((sb), (ucg)->cg_magic) == CG_MAGIC)
510/*
511 * Macros for access to old cylinder group array structures
512 */
513#define ufs_ocg_blktot(sb, ucg) fs32_to_cpu((sb), ((struct ufs_old_cylinder_group *)(ucg))->cg_btot)
514#define ufs_ocg_blks(sb, ucg, cylno) fs32_to_cpu((sb), ((struct ufs_old_cylinder_group *)(ucg))->cg_b[cylno])
515#define ufs_ocg_inosused(sb, ucg) fs32_to_cpu((sb), ((struct ufs_old_cylinder_group *)(ucg))->cg_iused)
516#define ufs_ocg_blksfree(sb, ucg) fs32_to_cpu((sb), ((struct ufs_old_cylinder_group *)(ucg))->cg_free)
517#define ufs_ocg_chkmagic(sb, ucg) \
518 (fs32_to_cpu((sb), ((struct ufs_old_cylinder_group *)(ucg))->cg_magic) == CG_MAGIC)
519
520/*
521 * size of this structure is 172 B
522 */
523struct ufs_cylinder_group {
524 __fs32 cg_link; /* linked list of cyl groups */
525 __fs32 cg_magic; /* magic number */
526 __fs32 cg_time; /* time last written */
527 __fs32 cg_cgx; /* we are the cgx'th cylinder group */
528 __fs16 cg_ncyl; /* number of cyl's this cg */
529 __fs16 cg_niblk; /* number of inode blocks this cg */
530 __fs32 cg_ndblk; /* number of data blocks this cg */
531 struct ufs_csum cg_cs; /* cylinder summary information */
532 __fs32 cg_rotor; /* position of last used block */
533 __fs32 cg_frotor; /* position of last used frag */
534 __fs32 cg_irotor; /* position of last used inode */
535 __fs32 cg_frsum[UFS_MAXFRAG]; /* counts of available frags */
536 __fs32 cg_btotoff; /* (__u32) block totals per cylinder */
537 __fs32 cg_boff; /* (short) free block positions */
538 __fs32 cg_iusedoff; /* (char) used inode map */
539 __fs32 cg_freeoff; /* (u_char) free block map */
540 __fs32 cg_nextfreeoff; /* (u_char) next available space */
541 union {
542 struct {
543 __fs32 cg_clustersumoff; /* (u_int32) counts of avail clusters */
544 __fs32 cg_clusteroff; /* (u_int8) free cluster map */
545 __fs32 cg_nclusterblks; /* number of clusters this cg */
546 __fs32 cg_sparecon[13]; /* reserved for future use */
547 } cg_44;
548 struct {
549 __fs32 cg_clustersumoff;/* (u_int32) counts of avail clusters */
550 __fs32 cg_clusteroff; /* (u_int8) free cluster map */
551 __fs32 cg_nclusterblks;/* number of clusters this cg */
552 __fs32 cg_niblk; /* number of inode blocks this cg */
553 __fs32 cg_initediblk; /* last initialized inode */
554 __fs32 cg_sparecon32[3];/* reserved for future use */
555 __fs64 cg_time; /* time last written */
556 __fs64 cg_sparecon[3]; /* reserved for future use */
557 } cg_u2;
558 __fs32 cg_sparecon[16]; /* reserved for future use */
559 } cg_u;
560 __u8 cg_space[1]; /* space for cylinder group maps */
561/* actually longer */
562};
563
564/* Historic Cylinder group info */
565struct ufs_old_cylinder_group {
566 __fs32 cg_link; /* linked list of cyl groups */
567 __fs32 cg_rlink; /* for incore cyl groups */
568 __fs32 cg_time; /* time last written */
569 __fs32 cg_cgx; /* we are the cgx'th cylinder group */
570 __fs16 cg_ncyl; /* number of cyl's this cg */
571 __fs16 cg_niblk; /* number of inode blocks this cg */
572 __fs32 cg_ndblk; /* number of data blocks this cg */
573 struct ufs_csum cg_cs; /* cylinder summary information */
574 __fs32 cg_rotor; /* position of last used block */
575 __fs32 cg_frotor; /* position of last used frag */
576 __fs32 cg_irotor; /* position of last used inode */
577 __fs32 cg_frsum[8]; /* counts of available frags */
578 __fs32 cg_btot[32]; /* block totals per cylinder */
579 __fs16 cg_b[32][8]; /* positions of free blocks */
580 __u8 cg_iused[256]; /* used inode map */
581 __fs32 cg_magic; /* magic number */
582 __u8 cg_free[1]; /* free block map */
583/* actually longer */
584};
585
586/*
587 * structure of an on-disk inode
588 */
589struct ufs_inode {
590 __fs16 ui_mode; /* 0x0 */
591 __fs16 ui_nlink; /* 0x2 */
592 union {
593 struct {
594 __fs16 ui_suid; /* 0x4 */
595 __fs16 ui_sgid; /* 0x6 */
596 } oldids;
597 __fs32 ui_inumber; /* 0x4 lsf: inode number */
598 __fs32 ui_author; /* 0x4 GNU HURD: author */
599 } ui_u1;
600 __fs64 ui_size; /* 0x8 */
601 struct ufs_timeval ui_atime; /* 0x10 access */
602 struct ufs_timeval ui_mtime; /* 0x18 modification */
603 struct ufs_timeval ui_ctime; /* 0x20 creation */
604 union {
605 struct {
606 __fs32 ui_db[UFS_NDADDR];/* 0x28 data blocks */
607 __fs32 ui_ib[UFS_NINDIR];/* 0x58 indirect blocks */
608 } ui_addr;
609 __u8 ui_symlink[4*(UFS_NDADDR+UFS_NINDIR)];/* 0x28 fast symlink */
610 } ui_u2;
611 __fs32 ui_flags; /* 0x64 immutable, append-only... */
612 __fs32 ui_blocks; /* 0x68 blocks in use */
613 __fs32 ui_gen; /* 0x6c like ext2 i_version, for NFS support */
614 union {
615 struct {
616 __fs32 ui_shadow; /* 0x70 shadow inode with security data */
617 __fs32 ui_uid; /* 0x74 long EFT version of uid */
618 __fs32 ui_gid; /* 0x78 long EFT version of gid */
619 __fs32 ui_oeftflag; /* 0x7c reserved */
620 } ui_sun;
621 struct {
622 __fs32 ui_uid; /* 0x70 File owner */
623 __fs32 ui_gid; /* 0x74 File group */
624 __fs32 ui_spare[2]; /* 0x78 reserved */
625 } ui_44;
626 struct {
627 __fs32 ui_uid; /* 0x70 */
628 __fs32 ui_gid; /* 0x74 */
629 __fs16 ui_modeh; /* 0x78 mode high bits */
630 __fs16 ui_spare; /* 0x7A unused */
631 __fs32 ui_trans; /* 0x7c filesystem translator */
632 } ui_hurd;
633 } ui_u3;
634};
635
636#define UFS_NXADDR 2 /* External addresses in inode. */
637struct ufs2_inode {
638 __fs16 ui_mode; /* 0: IFMT, permissions; see below. */
639 __fs16 ui_nlink; /* 2: File link count. */
640 __fs32 ui_uid; /* 4: File owner. */
641 __fs32 ui_gid; /* 8: File group. */
642 __fs32 ui_blksize; /* 12: Inode blocksize. */
643 __fs64 ui_size; /* 16: File byte count. */
644 __fs64 ui_blocks; /* 24: Bytes actually held. */
645 __fs64 ui_atime; /* 32: Last access time. */
646 __fs64 ui_mtime; /* 40: Last modified time. */
647 __fs64 ui_ctime; /* 48: Last inode change time. */
648 __fs64 ui_birthtime; /* 56: Inode creation time. */
649 __fs32 ui_mtimensec; /* 64: Last modified time. */
650 __fs32 ui_atimensec; /* 68: Last access time. */
651 __fs32 ui_ctimensec; /* 72: Last inode change time. */
652 __fs32 ui_birthnsec; /* 76: Inode creation time. */
653 __fs32 ui_gen; /* 80: Generation number. */
654 __fs32 ui_kernflags; /* 84: Kernel flags. */
655 __fs32 ui_flags; /* 88: Status flags (chflags). */
656 __fs32 ui_extsize; /* 92: External attributes block. */
657 __fs64 ui_extb[UFS_NXADDR];/* 96: External attributes block. */
658 union {
659 struct {
660 __fs64 ui_db[UFS_NDADDR]; /* 112: Direct disk blocks. */
661 __fs64 ui_ib[UFS_NINDIR];/* 208: Indirect disk blocks.*/
662 } ui_addr;
663 __u8 ui_symlink[2*4*(UFS_NDADDR+UFS_NINDIR)];/* 0x28 fast symlink */
664 } ui_u2;
665 __fs64 ui_spare[3]; /* 232: Reserved; currently unused */
666};
667
668
669/* FreeBSD has these in sys/stat.h */
670/* ui_flags that can be set by a file owner */
671#define UFS_UF_SETTABLE 0x0000ffff
672#define UFS_UF_NODUMP 0x00000001 /* do not dump */
673#define UFS_UF_IMMUTABLE 0x00000002 /* immutable (can't "change") */
674#define UFS_UF_APPEND 0x00000004 /* append-only */
675#define UFS_UF_OPAQUE 0x00000008 /* directory is opaque (unionfs) */
676#define UFS_UF_NOUNLINK 0x00000010 /* can't be removed or renamed */
677/* ui_flags that only root can set */
678#define UFS_SF_SETTABLE 0xffff0000
679#define UFS_SF_ARCHIVED 0x00010000 /* archived */
680#define UFS_SF_IMMUTABLE 0x00020000 /* immutable (can't "change") */
681#define UFS_SF_APPEND 0x00040000 /* append-only */
682#define UFS_SF_NOUNLINK 0x00100000 /* can't be removed or renamed */
683
684/*
685 * This structure is used for reading disk structures larger
686 * than the size of fragment.
687 */
688struct ufs_buffer_head {
689 __u64 fragment; /* first fragment */
690 __u64 count; /* number of fragments */
691 struct buffer_head * bh[UFS_MAXFRAG]; /* buffers */
692};
693
694struct ufs_cg_private_info {
695 struct ufs_buffer_head c_ubh;
696 __u32 c_cgx; /* number of cylidner group */
697 __u16 c_ncyl; /* number of cyl's this cg */
698 __u16 c_niblk; /* number of inode blocks this cg */
699 __u32 c_ndblk; /* number of data blocks this cg */
700 __u32 c_rotor; /* position of last used block */
701 __u32 c_frotor; /* position of last used frag */
702 __u32 c_irotor; /* position of last used inode */
703 __u32 c_btotoff; /* (__u32) block totals per cylinder */
704 __u32 c_boff; /* (short) free block positions */
705 __u32 c_iusedoff; /* (char) used inode map */
706 __u32 c_freeoff; /* (u_char) free block map */
707 __u32 c_nextfreeoff; /* (u_char) next available space */
708 __u32 c_clustersumoff;/* (u_int32) counts of avail clusters */
709 __u32 c_clusteroff; /* (u_int8) free cluster map */
710 __u32 c_nclusterblks; /* number of clusters this cg */
711};
712
713
714struct ufs_sb_private_info {
715 struct ufs_buffer_head s_ubh; /* buffer containing super block */
716 struct ufs_csum_core cs_total;
717 __u32 s_sblkno; /* offset of super-blocks in filesys */
718 __u32 s_cblkno; /* offset of cg-block in filesys */
719 __u32 s_iblkno; /* offset of inode-blocks in filesys */
720 __u32 s_dblkno; /* offset of first data after cg */
721 __u32 s_cgoffset; /* cylinder group offset in cylinder */
722 __u32 s_cgmask; /* used to calc mod fs_ntrak */
723 __u32 s_size; /* number of blocks (fragments) in fs */
724 __u32 s_dsize; /* number of data blocks in fs */
725 __u64 s_u2_size; /* ufs2: number of blocks (fragments) in fs */
726 __u64 s_u2_dsize; /*ufs2: number of data blocks in fs */
727 __u32 s_ncg; /* number of cylinder groups */
728 __u32 s_bsize; /* size of basic blocks */
729 __u32 s_fsize; /* size of fragments */
730 __u32 s_fpb; /* fragments per block */
731 __u32 s_minfree; /* minimum percentage of free blocks */
732 __u32 s_bmask; /* `blkoff'' calc of blk offsets */
733 __u32 s_fmask; /* s_fsize mask */
734 __u32 s_bshift; /* `lblkno'' calc of logical blkno */
735 __u32 s_fshift; /* s_fsize shift */
736 __u32 s_fpbshift; /* fragments per block shift */
737 __u32 s_fsbtodb; /* fsbtodb and dbtofsb shift constant */
738 __u32 s_sbsize; /* actual size of super block */
739 __u32 s_csmask; /* csum block offset */
740 __u32 s_csshift; /* csum block number */
741 __u32 s_nindir; /* value of NINDIR */
742 __u32 s_inopb; /* value of INOPB */
743 __u32 s_nspf; /* value of NSPF */
744 __u32 s_npsect; /* # sectors/track including spares */
745 __u32 s_interleave; /* hardware sector interleave */
746 __u32 s_trackskew; /* sector 0 skew, per track */
747 __u64 s_csaddr; /* blk addr of cyl grp summary area */
748 __u32 s_cssize; /* size of cyl grp summary area */
749 __u32 s_cgsize; /* cylinder group size */
750 __u32 s_ntrak; /* tracks per cylinder */
751 __u32 s_nsect; /* sectors per track */
752 __u32 s_spc; /* sectors per cylinder */
753 __u32 s_ipg; /* inodes per cylinder group */
754 __u32 s_fpg; /* fragments per group */
755 __u32 s_cpc; /* cyl per cycle in postbl */
756 __s32 s_contigsumsize;/* size of cluster summary array, 44bsd */
757 __s64 s_qbmask; /* ~usb_bmask */
758 __s64 s_qfmask; /* ~usb_fmask */
759 __s32 s_postblformat; /* format of positional layout tables */
760 __s32 s_nrpos; /* number of rotational positions */
761 __s32 s_postbloff; /* (__s16) rotation block list head */
762 __s32 s_rotbloff; /* (__u8) blocks for each rotation */
763
764 __u32 s_fpbmask; /* fragments per block mask */
765 __u32 s_apb; /* address per block */
766 __u32 s_2apb; /* address per block^2 */
767 __u32 s_3apb; /* address per block^3 */
768 __u32 s_apbmask; /* address per block mask */
769 __u32 s_apbshift; /* address per block shift */
770 __u32 s_2apbshift; /* address per block shift * 2 */
771 __u32 s_3apbshift; /* address per block shift * 3 */
772 __u32 s_nspfshift; /* number of sector per fragment shift */
773 __u32 s_nspb; /* number of sector per block */
774 __u32 s_inopf; /* inodes per fragment */
775 __u32 s_sbbase; /* offset of NeXTstep superblock */
776 __u32 s_bpf; /* bits per fragment */
777 __u32 s_bpfshift; /* bits per fragment shift*/
778 __u32 s_bpfmask; /* bits per fragment mask */
779
780 __u32 s_maxsymlinklen;/* upper limit on fast symlinks' size */
781 __s32 fs_magic; /* filesystem magic */
782 unsigned int s_dirblksize;
783};
784
785/*
786 * Sizes of this structures are:
787 * ufs_super_block_first 512
788 * ufs_super_block_second 512
789 * ufs_super_block_third 356
790 */
791struct ufs_super_block_first {
792 union {
793 struct {
794 __fs32 fs_link; /* UNUSED */
795 } fs_42;
796 struct {
797 __fs32 fs_state; /* file system state flag */
798 } fs_sun;
799 } fs_u0;
800 __fs32 fs_rlink;
801 __fs32 fs_sblkno;
802 __fs32 fs_cblkno;
803 __fs32 fs_iblkno;
804 __fs32 fs_dblkno;
805 __fs32 fs_cgoffset;
806 __fs32 fs_cgmask;
807 __fs32 fs_time;
808 __fs32 fs_size;
809 __fs32 fs_dsize;
810 __fs32 fs_ncg;
811 __fs32 fs_bsize;
812 __fs32 fs_fsize;
813 __fs32 fs_frag;
814 __fs32 fs_minfree;
815 __fs32 fs_rotdelay;
816 __fs32 fs_rps;
817 __fs32 fs_bmask;
818 __fs32 fs_fmask;
819 __fs32 fs_bshift;
820 __fs32 fs_fshift;
821 __fs32 fs_maxcontig;
822 __fs32 fs_maxbpg;
823 __fs32 fs_fragshift;
824 __fs32 fs_fsbtodb;
825 __fs32 fs_sbsize;
826 __fs32 fs_csmask;
827 __fs32 fs_csshift;
828 __fs32 fs_nindir;
829 __fs32 fs_inopb;
830 __fs32 fs_nspf;
831 __fs32 fs_optim;
832 union {
833 struct {
834 __fs32 fs_npsect;
835 } fs_sun;
836 struct {
837 __fs32 fs_state;
838 } fs_sunx86;
839 } fs_u1;
840 __fs32 fs_interleave;
841 __fs32 fs_trackskew;
842 __fs32 fs_id[2];
843 __fs32 fs_csaddr;
844 __fs32 fs_cssize;
845 __fs32 fs_cgsize;
846 __fs32 fs_ntrak;
847 __fs32 fs_nsect;
848 __fs32 fs_spc;
849 __fs32 fs_ncyl;
850 __fs32 fs_cpg;
851 __fs32 fs_ipg;
852 __fs32 fs_fpg;
853 struct ufs_csum fs_cstotal;
854 __s8 fs_fmod;
855 __s8 fs_clean;
856 __s8 fs_ronly;
857 __s8 fs_flags;
858 __s8 fs_fsmnt[UFS_MAXMNTLEN - 212];
859
860};
861
862struct ufs_super_block_second {
863 union {
864 struct {
865 __s8 fs_fsmnt[212];
866 __fs32 fs_cgrotor;
867 __fs32 fs_csp[UFS_MAXCSBUFS];
868 __fs32 fs_maxcluster;
869 __fs32 fs_cpc;
870 __fs16 fs_opostbl[82];
871 } fs_u1;
872 struct {
873 __s8 fs_fsmnt[UFS2_MAXMNTLEN - UFS_MAXMNTLEN + 212];
874 __u8 fs_volname[UFS2_MAXVOLLEN];
875 __fs64 fs_swuid;
876 __fs32 fs_pad;
877 __fs32 fs_cgrotor;
878 __fs32 fs_ocsp[UFS2_NOCSPTRS];
879 __fs32 fs_contigdirs;
880 __fs32 fs_csp;
881 __fs32 fs_maxcluster;
882 __fs32 fs_active;
883 __fs32 fs_old_cpc;
884 __fs32 fs_maxbsize;
885 __fs64 fs_sparecon64[17];
886 __fs64 fs_sblockloc;
887 __fs64 cs_ndir;
888 __fs64 cs_nbfree;
889 } fs_u2;
890 } fs_un;
891};
892
893struct ufs_super_block_third {
894 union {
895 struct {
896 __fs16 fs_opostbl[46];
897 } fs_u1;
898 struct {
899 __fs64 cs_nifree; /* number of free inodes */
900 __fs64 cs_nffree; /* number of free frags */
901 __fs64 cs_numclusters; /* number of free clusters */
902 __fs64 cs_spare[3]; /* future expansion */
903 struct ufs_timeval fs_time; /* last time written */
904 __fs64 fs_size; /* number of blocks in fs */
905 __fs64 fs_dsize; /* number of data blocks in fs */
906 __fs64 fs_csaddr; /* blk addr of cyl grp summary area */
907 __fs64 fs_pendingblocks;/* blocks in process of being freed */
908 __fs32 fs_pendinginodes;/*inodes in process of being freed */
909 } __attribute__ ((packed)) fs_u2;
910 } fs_un1;
911 union {
912 struct {
913 __fs32 fs_sparecon[53];/* reserved for future constants */
914 __fs32 fs_reclaim;
915 __fs32 fs_sparecon2[1];
916 __fs32 fs_state; /* file system state time stamp */
917 __fs32 fs_qbmask[2]; /* ~usb_bmask */
918 __fs32 fs_qfmask[2]; /* ~usb_fmask */
919 } fs_sun;
920 struct {
921 __fs32 fs_sparecon[53];/* reserved for future constants */
922 __fs32 fs_reclaim;
923 __fs32 fs_sparecon2[1];
924 __fs32 fs_npsect; /* # sectors/track including spares */
925 __fs32 fs_qbmask[2]; /* ~usb_bmask */
926 __fs32 fs_qfmask[2]; /* ~usb_fmask */
927 } fs_sunx86;
928 struct {
929 __fs32 fs_sparecon[50];/* reserved for future constants */
930 __fs32 fs_contigsumsize;/* size of cluster summary array */
931 __fs32 fs_maxsymlinklen;/* max length of an internal symlink */
932 __fs32 fs_inodefmt; /* format of on-disk inodes */
933 __fs32 fs_maxfilesize[2]; /* max representable file size */
934 __fs32 fs_qbmask[2]; /* ~usb_bmask */
935 __fs32 fs_qfmask[2]; /* ~usb_fmask */
936 __fs32 fs_state; /* file system state time stamp */
937 } fs_44;
938 } fs_un2;
939 __fs32 fs_postblformat;
940 __fs32 fs_nrpos;
941 __fs32 fs_postbloff;
942 __fs32 fs_rotbloff;
943 __fs32 fs_magic;
944 __u8 fs_space[1];
945};
946
947#endif /* __LINUX_UFS_FS_H */
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-26 02:23:23 -0500